Resumo

CUELLAR BURGOS, ALNEIRA; MESA RUEDA, FABIO AUGUSTO; VARGAS HERNANDEZ, CARLOS  e  PERILLA PERILLA, JAIRO ERNESTO. MODIFIED CLAY CHARACTERIZED BY MICRO-RAMAN AND X-RAY DIFFRACTION. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.164, pp.39-44. ISSN 0012-7353.

The micro-Raman spectroscopy and X-ray-diffraction (XRD) was used as analytical techniques in pristine and hybrid clay. It was determined that the water content of adsorption decreases with the insertion of surfactants and with the increase in the number of hydrophobic chains, where the basal spacing observed in the XRD is relatively invariant for this type of modified clays. We identified some vibrational modes for both the pristine clay and organoclay. The most important band of absorption is CH₂, symmetrical (2846 cm^-1) and asymmetrical (2886 cm^-1), which are intense. Other hand, we identified other vibrational modes of the aromatic ring at 1001cm^-1 and 1600cm^-1 and the group of the chain aliphatic C-C in 1296 cm^-1 between others. Furthermore, the band corresponding to the vibrational mode of the OH group in 3625 cm^-1 is not affected by the type of modifying being used on the clay.

Palavras-chave : Raman spectroscopy; montmorillonite; surfactant; hybrids; intercalation.

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